Open Access
ARTICLE
Convective Instability in Annular Pools
Y.R. Li1, L. Peng1, W.Y. Shi1, N. Imaishi2
1
Chongqing University, Chongqing, China
2
Kyushu University, Kasuga, Japan
Fluid Dynamics & Materials Processing 2006, 2(3), 153-166. https://doi.org/10.3970/fdmp.2006.002.153
Abstract
The convective instabilities in semiconduc-tor or oxide melts, significantly affect the quality oflarge crystals grown from the melts by the Czochralskimethod. This paper reviewsour recent numerical stud-ies of thermal convection in annular pools of low-
Pr sili-con melt and moderate-
Pr silicone oil. The mechanismsof the convective instability are discussed and the criticalconditions for the onset of three-dimensional flow are de-termined. The results show that the hydrothermal wave,characterized by curved spokes, is dominant in a shallowthin pool. In a thick pool of the low-
Pr silicon melt, thereappears a standing wave type of oscillatory longitudinalrolls, which moves in the azimuthal direction and looksvery similar to the hydrothermal waves. In deep poolsof moderate-
Pr silicone oil, a three-dimensional steadyflow pattern, consistingof pairs of counter-rotating longi-tudinal rolls, arises, which corresponds to the Rayleigh-Benard instability
Keywords
Cite This Article
Li, Y., Peng, L., Shi, W., Imaishi, N. (2006). Convective Instability in Annular Pools.
FDMP-Fluid Dynamics & Materials Processing, 2(3), 153–166. https://doi.org/10.3970/fdmp.2006.002.153